I am currently working on a project in Android. I want to get the total cpu usage of each and every process. So i am using the contents of "/proc/pid/stat". I referred this answer to get the stats. Now i got all the utime, stime etc., The problem is with the value of "Hertz". The answer says that it is the number of clock ticks per second. I don't get the exact meaning of clock tick even after browsing a lot. What is a clock tick and is it the frequency of the processor? And the answer says that we can get the clock ticks using
我目前正在开发一个Android项目。我想获得每个进程的总CPU使用率。所以我使用“/ proc / pid / stat”的内容。我提到这个答案来获取统计数据。现在我得到了所有的utime，stime等，问题在于“Hertz”的价值。答案是它是每秒钟的滴答数。即使经过大量浏览，我也无法获得时钟刻度的确切含义。什么是时钟滴答，它是处理器的频率？答案说我们可以使用时钟滴答
sysconf(_SC_CLK_TCK)
的sysconf（_SC_CLK_TCK）
I don't know how to use this linux command in Android to get the clock ticks. I have googled it and i couldn't find it. Pls help me with this. And it would be more helpful if there is an example for this clock tick.
我不知道如何在Android中使用这个linux命令来获取时钟滴答。我用谷歌搜索它，我找不到它。请帮我解决这个问题。如果有一个这个时钟滴答的例子会更有帮助。
1 个解决方案
#1
5
100 is the default value set on Linux. And it appears to be unchanged in Android as shown in the sysconf.c source file - goo.gl/C5yubg
100是Linux上设置的默认值。它在Android中似乎没有变化，如sysconf.c源文件所示 - goo.gl/C5yubg
If you see line 167, this is what sysconf(_SC_CLK_TCK) will retrun:
如果你看到第167行，这就是sysconf（_SC_CLK_TCK）将重新启动的内容：
case _SC_CLK_TCK: return SYSTEM_CLK_TCK;
case _SC_CLK_TCK：return SYSTEM_CLK_TCK;
The default value for SYSTEM_CLK_TCK is defined as 100
SYSTEM_CLK_TCK的默认值定义为100
#1
5
100 is the default value set on Linux. And it appears to be unchanged in Android as shown in the sysconf.c source file - goo.gl/C5yubg
100是Linux上设置的默认值。它在Android中似乎没有变化，如sysconf.c源文件所示 - goo.gl/C5yubg
If you see line 167, this is what sysconf(_SC_CLK_TCK) will retrun:
如果你看到第167行，这就是sysconf（_SC_CLK_TCK）将重新启动的内容：
case _SC_CLK_TCK: return SYSTEM_CLK_TCK;
case _SC_CLK_TCK：return SYSTEM_CLK_TCK;
The default value for SYSTEM_CLK_TCK is defined as 100
SYSTEM_CLK_TCK的默认值定义为100